A cotton fabric (110 GSM, 1 m wide) is to be dyed by pad-dry-bake sequence (wet expression 100%) on a machine running at 50 m/min. The volume of the padding liquor (V ; l) is kept constant by continuous replenishing
Question 83 (Textile Engineering & Fibre Science)
If the dye bath concentration is to be kept constant at the original level Co, the concentration (g/l) of the replenishing liquor would be
| (A) | 2.0 Co |
| (B) | 1.6 Co |
| (C) | 1.2 Co |
| (D) | 0.8 Co |
[Show Answer]
Option C is correct
Dye is being picked at a rate 1.2 times the rate when there is no tailing effect.
The concentration (g/l) of dye bath at equilibrium=?
Pick-up or initial concentration=1.2 x Feed-up concentration(concentration (g/l) of dye bath at equilibrium)